<template>
  <div :class="$style['tags-view-container']">
    <scroll-pane ref="scrollPane" :class="$style['tags-view-wrapper']">
      <router-link
        v-for="tag in visitedViews"
        ref="tag"
        :key="tag.path"
        :class="[isActive(tag) ? $style.active : '', $style['tags-view-item']]"
        :to="{ path: tag.path, query: tag.query, fullPath: tag.fullPath }"
        tag="span"
        @click.middle="closeSelectedTag(tag)"
        @contextmenu.prevent="openMenu(tag, $event)"
      >
        {{ tag.title }}
        <span
          v-if="!tag.meta.affix"
          class="el-icon-close"
          @click.prevent.stop="closeSelectedTag(tag)"
        />
      </router-link>
    </scroll-pane>
    <ul
      v-show="visible"
      :style="{ left: left + 'px', top: top + 'px' }"
      :class="$style.contextmenu"
    >
      <li @click="refreshSelectedTag(selectedTag)">刷新</li>
      <li
        v-if="!(selectedTag.meta && selectedTag.meta.affix)"
        @click="closeSelectedTag(selectedTag)"
      >
        关闭
      </li>
      <li @click="closeOthersTags">关闭其它</li>
      <li @click="closeAllTags(selectedTag)">关闭所有</li>
    </ul>
  </div>
</template>

<script>
import ScrollPane from './ScrollPane'
import path from 'path'

export default {
  components: { ScrollPane },
  emits: ['close'],
  data() {
    return {
      visible: false,
      top: 0,
      left: 0,
      selectedTag: {},
      affixTags: [],
    }
  },
  computed: {
    visitedViews() {
      return this.$store.state.tagsView.visitedViews
    },
    // routes() {
    //   return this.$store.state.permission.routes;
    // },
  },
  watch: {
    $route() {
      this.addTags()
      // this.moveToCurrentTag()
    },
    visible(value) {
      if (value) {
        document.body.addEventListener('click', this.closeMenu)
      } else {
        document.body.removeEventListener('click', this.closeMenu)
      }
    },
  },
  mounted() {
    // this.initTags();
    this.addTags()
  },
  methods: {
    isActive(route) {
      return route.path === this.$route.path
    },
    filterAffixTags(routes, basePath = '/') {
      let tags = []
      routes.forEach((route) => {
        if (route.meta && route.meta.affix) {
          const tagPath = path.resolve(basePath, route.path)
          tags.push({
            fullPath: tagPath,
            path: tagPath,
            name: route.name,
            meta: { ...route.meta },
          })
        }
        if (route.children) {
          const tempTags = this.filterAffixTags(route.children, route.path)
          if (tempTags.length >= 1) {
            tags = [...tags, ...tempTags]
          }
        }
      })
      return tags
    },
    initTags() {
      const affixTags = (this.affixTags = this.filterAffixTags(this.routes))
      for (const tag of affixTags) {
        // Must have tag name
        if (tag.name) {
          this.$store.dispatch('addVisitedView', tag)
        }
      }
    },
    addTags() {
      const route = this.$route
      if (this.$route.name) {
        route.meta.title = this.$route.name
        this.$store.dispatch('addVisitedViews', route)
      }
      return false
    },
    moveToCurrentTag() {
      const tags = this.$refs.tag
      this.$nextTick(() => {
        if (tags.to.path === this.$route.path) {
          this.$refs.scrollPane.moveToTarget(tags)
          // when query is different then update
          if (tags.to.fullPath !== this.$route.fullPath) {
            this.$store.dispatch('updateVisitedView', this.$route)
          }
        }
      })
    },
    refreshSelectedTag() {
      location.reload()
      // this.$store.dispatch("delCachedView", view).then(() => {
      //   const { fullPath } = view;
      //   this.$nextTick(() => {
      //     this.$router.replace({
      //       path: "/redirect" + fullPath,
      //     });
      //   });
      // });
    },
    closeSelectedTag(view) {
      this.$store.dispatch('delVisitedViews', view).then(({ visitedViews }) => {        
        if (this.isActive(view)) {
          this.toLastView(visitedViews)
        }
      })
    },
    closeOthersTags() {
      this.$router.push(this.selectedTag)
      this.$store.dispatch('delOthersViews', this.selectedTag).then(() => {
        this.moveToCurrentTag()
      })
    },
    closeAllTags(view) {
      this.$store.dispatch('delAllViews').then(({ visitedViews }) => {
        if (this.affixTags.some((tag) => tag.path === view.path)) {
          return
        }
        this.toLastView(visitedViews)
      })
    },
    toLastView(visitedViews) {
      const latestView = visitedViews.slice(-1)[0]
 
      if (latestView) {
        this.$router.push(latestView)
      } else {
        // You can set another route
        this.$router.push('/')
      }
    },
    openMenu(tag, e) {
      const menuMinWidth = 105
      const offsetLeft = this.$el.getBoundingClientRect().left // container margin left
      const offsetWidth = this.$el.offsetWidth // container width
      const maxLeft = offsetWidth - menuMinWidth // left boundary
      const left = e.clientX - offsetLeft + 155 // 15: margin right

      if (left > maxLeft) {
        this.left = maxLeft
      } else {
        this.left = left
      }

      this.top = e.clientY
      this.visible = true
      this.selectedTag = tag
    },
    closeMenu() {
      this.visible = false
    },
  },
}
</script>

<style lang="scss" module>
.tags-view-container {
  height: 35px;
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #f1f1f1;
  .tags-view-wrapper {
    .tags-view-item {
      display: inline-block;
      position: relative;
      cursor: pointer;
      height: 34px;
      line-height: 34px;
      border-left: 1px solid #f1f1f1;
      color: #999;
      background: #fff;
      padding: 0 5px 0 20px;
      font-size: 13px;
      transition: all 0.3s;
      .el-icon-none {
        width: 16px;
      }
      &:hover {
        color: #495060;
        & .el-icon-close {
          font-size: 1rem;
          font-weight: bold;
          color: red;
        }
      }
      &:first-of-type {
      }
      &:last-of-type {
        border-right: 1px solid #f1f1f1;
      }
      &.active {
        /*background-color: #42b983;*/
        /*color: #fff;*/
        /*border-color: #42b983;*/
        &::before {
          content: '';
          background: #2c7dff !important;
          box-shadow: 0 0 7px #2c7bfb;
          display: inline-block;
          bottom: 3px;
          width: 5px;
          height: 5px;
          border-radius: 50%;
          position: relative;
          margin-right: 4px;
        }
      }
    }
  }
  .contextmenu {
    margin: 0;
    background: #fff;
    z-index: 3000;
    position: absolute;
    list-style-type: none;
    padding: 5px 0;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 400;
    color: #333;
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
    li {
      margin: 0;
      padding: 7px 20px;
      cursor: pointer;
      &:hover {
        background-color: #e8f4ff;
        color: #46a6ff;
      }
    }
  }
}
</style>

<style lang="scss">
//reset element css of el-icon-close
.tags-view-wrapper {
  .tags-view-item {
    .el-icon-close {
      color: #fff;
      width: 16px;
      height: 16px;
      vertical-align: 2px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 50%;
      text-align: center;
      transform-origin: 100% 50%;
      &:before {
        transform: scale(0.6);
        display: inline-block;
        vertical-align: -3px;
      }
      &:hover {
        /*background-color: #b4bccc;*/
        /*color: #fff;*/
      }
    }
  }
}
</style>
